JP3306561B2 - Container capping equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container cap device which uses a threaded cap and can achieve good sealing performance.

[0002]

2. Description of the Related Art In a plastic container for accommodating a chemical solution or the like, an annular ridge is formed on a top surface of a cap, and a concave groove is formed on an end surface of a mouth portion of the container so as to fit the ridge on a cap side. As a result, a cap device capable of realizing good airtightness and watertightness has been proposed (Japanese Utility Model Application Laid-Open No. 5 (1993)).
2-118740).

In this device, the ridge on the cap side has a V-shaped cross section, and the concave groove on the container side has a V-shaped cross section in accordance with the cross-sectional shape of the ridge. Therefore, according to this article, by closing the cap, the ridge fits into the concave groove and is compressed and deformed in the concave groove, so that good sealing performance can be realized.

[0004]

According to the prior art, the sealability of the cap depends on the fact that both side surfaces of the ridge on the cap side are in close contact with both wall surfaces of the concave groove on the container side. Therefore, there is a problem that it is difficult to apply to an application in which the cap is screwed and needs to be opened and closed many times. In other words, when the cap is removed, if the end face of the mouth of the container is scratched or a partial defect occurs on the wall surface of the concave groove, the sealing property is easily lost, and when the cap is tightened. In addition, the cap tends to be eccentric with respect to the mouth, and in such a case, sufficient sealing performance cannot be obtained. In addition, if you tighten the cap in such an inappropriate state, the shape of the ridges and grooves will be damaged,
After that, it is difficult to restore the sealing performance no matter how accurately the cap is attached.

Accordingly, an object of the present invention is to provide a cap with a thread by forming a markedly wide groove on the end face of the mouth with respect to the ridge on the cap side in view of the problem of the prior art. Another object of the present invention is to provide a container cap device which can be sufficiently applied to applications requiring opening and closing many times.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, an embodiment of the present invention comprises a container having a threaded mouth, and a threaded cap mounted on the mouth. Form a ridge on the top surface, on the end surface of the mouth, corresponding to the ridge whose width gradually decreases toward the top, form an annular concave groove wider than the intermediate width of the protrusion, and tighten the cap The gist is that the top of the ridge is deformed by contacting the bottom of the groove.

[0007] The ridge can have an asymmetric cross-sectional shape and can have an overhang.

Further, the cap may have a cylindrical body fitted on the mouth formed on the top surface.

[0009]

According to the structure of the present invention, the concave groove on the mouth side of the container is formed sufficiently wider than the ridge on the cap side, and the sealing performance is such that the ridge contacts the bottom of the concave groove. It is realized by deformation. Therefore, even if the end face of the mouth is flawed and the wall surface of the groove is partially damaged, there is no possibility that the sealing property is impaired as long as the bottom of the groove is sound. Further, even when the cap is eccentric when the cap is tightened, there is no possibility that the sealing performance is irrecoverably impaired.

When the cross-sectional shape of the ridge is formed asymmetrically, the ridge can be selectively deformed, for example, only on the inner peripheral side, depending on the cross-sectional shape, thereby achieving better sealing performance. be able to.

If the ridge is provided with an inner circumferential overhang,
The ridge can be more effectively deformed to the inner peripheral side, and good sealing performance can be realized. However, the overhang can be provided not only on the inner peripheral side of the protrusion but also on the outer peripheral side. This is because the overhang can increase the degree of deformation of the ridge and improve the adhesion between the ridge and the bottom of the concave groove regardless of the forming direction.

When forming a cylinder on the top surface of the cap,
By fitting the cylindrical body into the mouth, an independent seal portion can be formed, and the sealing performance can be further improved.

[0013]

Embodiments will be described below with reference to the drawings.

The container cap device includes a threaded mouth 1.
1 and a threaded cap 20 (FIGS. 1 and 2).

The container 10 is a plastic container having a predetermined capacity. An annular rib 13 for stabilizing the lower end of the cap 20 is formed on the outer periphery of the mouth 11 in addition to the male screw 12. A step 14 is formed at the upper end of the outer periphery of the mouth 11, and an annular groove 1 is formed at the end face of the mouth 11.
5 are formed.

The cap 20 is a plastic lid that fits the mouth portion 11, and has a female screw 21 formed on the inner periphery that matches the male screw 12, and a knurl 22 on the outer periphery.
Are formed. A skirt-shaped cylinder 23 and an annular ridge 24 are formed on the top surface 20 a of the cap 20.

The outer peripheral lower end of the cylindrical body 23 is tapered, and the outer diameter above the intermediate part is set so as to fit into the mouth 11 with respect to the inner diameter of the mouth 11. I do.
The protruding ridges 24 are arranged concentrically with respect to the cylindrical body 23, and are formed in a V-shaped cross section whose width gradually decreases toward the top 24a so as to correspond to the concave groove 15 on the container 10 side. (FIG. 3). The height h of the ridge 24 is h> d with respect to the depth d of the groove 15, and the width w of the groove 15 is w≫w1 with respect to the intermediate width w1 of the ridge 24. . However, the intermediate width w1 of the ridge 24 refers to the width of the ridge 24 at a distance h1 ≒ h−d from the top surface 20a.

The cap 20 can be detachably attached to the mouth 11 of the container 10 via the male screw 12 and the female screw 21. When the cap 20 is tightened, the cylindrical body 23 on the cap 20 side fits into the mouth 11, and the top 24 a of the ridge 24 fits into the bottom 15 of the groove 15.
Since it is deformed by contact with a (a two-dot chain line in FIG. 3), good sealing performance can be obtained. Note that the concave groove 15 is
4 is sufficiently wider than the intermediate width w1, so that even when the cap 20 is slightly eccentric when the cap 20 is tightened, the relative relationship between the ridges 24 and the grooves 15 is kept substantially constant. be able to.

In the above description, the cylindrical body 23 of the cap 20 is fitted into the mouth 11 to form an independent sealing portion with the mouth 11, and the projection 23 and the groove 15 It is also effective to keep the relative relation of the constant. However, the cylindrical body 23 may be omitted by making the width w of the concave groove 15 sufficiently large. This is because if the width w of the groove 15 is large, even if the cap 20 is slightly eccentric, the ridge 24 can stably contact the bottom 15 a of the groove 15.

[0020]

Another Embodiment The ridge 24 on the cap 20 side may be rounded at its top 24a in an arc shape (FIG. 4). Top 24a
When the cap 20 is softer than the container 10, the contact area with the bottom 15 a can be increased when the cap 20 is deformed by contacting the bottom 15 a of the concave groove 15.
Even better sealing performance can be achieved.

The ridge 24 may have an asymmetric cross-sectional shape (FIG. 5). Further, the ridge 24 may be provided with an overhang a on the inner peripheral side (FIG. 2). The ridge 24 is the top 24
When a contacts the bottom 15a of the concave groove 15, it is very easily deformed to the inner peripheral side, and the sealing performance can be further improved. The overhang a at this time is the cap 2
In order not to make it difficult to remove the mold when molding 0, the amount should be limited to the minute amount allowed by the material. Also,
The overhang a may be provided on the outer peripheral side of the ridge 24.

The cap 20 can be provided with an inner lid 30 for storing the desiccant K (FIGS. 6 and 7).

The cap 20 has an annular engagement rib 25 formed close to the top surface 20a, and a small-diameter cylinder 26 is suspended from the center of the top surface 20a. Also, an engagement rib 26a is formed. On the other hand, the inner lid 30
Is formed in a shallow dish shape having ventilation holes 31, 31 at the bottom, and the upper flange 32 is formed to be equal to the inner diameter of the top surface 20a of the cap 20. On the lower surface 32 a of the flange 32, a tubular body 33 fitted to the mouth 11 and an annular ridge 34 corresponding to the concave groove 15 are formed. Note that, on the inner periphery of the inner lid 30, an engagement rib 3 that engages from above with the engagement rib 26a on the cap 20 side.
5 are formed.

The inner lid 30 contains a desiccant K therein and is pushed into the cap 20 so that the outer periphery of the flange 32 exceeds the engagement rib 25 and the engagement rib 35 is
By exceeding 6a, the cap 20 can be integrally attached to the cap 20. Therefore, when the cap 20 with the inner lid 30 is attached to the mouth portion 11 of the container 10, the cylindrical body 33 and the ridge 34 of the inner lid 30 become the cylindrical body 23 and the ridge in the embodiment of FIGS. Acting exactly the same as 24, it is possible to achieve good sealing. That is, in the present invention, the top surface 20 a of the cap 20 includes the lower surface 32 a of the flange 32 of the inner lid 30, the ridge 24 includes the ridge 34, and the cylindrical body 23 is the cylindrical body 33. Shall be included.

In the embodiment shown in FIGS. 6 and 7, the desiccant K may be a deodorant, and the tubular body 33 may be omitted.

[0026]

As described above, according to the present invention, a ridge is formed on the top surface of the cap, and a wide groove is formed on the end surface of the mouth of the container. Realizes good sealing performance by contacting and deforming the bottom of the groove, and does not contact the wall surface of the groove, so even when the cap is eccentric when tightening the cap, or Even if there is a flaw on the end face of the mouth, there is no risk of impairing the sealing performance, and therefore, it is suitably applied to applications where the cap is threaded and multiple opening and closing operations are required. There is an excellent effect that you can.

[Brief description of the drawings]

FIG. 1 Overall configuration diagram

[Fig. 2] Enlarged view of main parts

FIG. 3 is an explanatory diagram of an operation.

FIG. 4 is a view (1) corresponding to FIG. 3, showing another embodiment.

FIG. 5 is a view (2) corresponding to FIG. 3, showing another embodiment.

FIG. 6 is a view corresponding to FIG. 1, showing another embodiment.

FIG. 7 is a diagram corresponding to FIG. 2, showing another embodiment.

[Explanation of symbols]

 a ... overhang w1 ... intermediate width 10 ... container 11 ... mouth 15 ... concave groove 15a ... bottom 20

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 41/04 B65D 53/02

Claims (4)

(57) [Claims] 1. A container having a threaded mouth and a threaded cap attached to the mouth, the cap having an annular ridge formed on a top surface, and a cap formed on an end surface of the mouth. Corresponds to the ridge whose width gradually decreases toward the top, forms an annular groove wider than the intermediate width of the protrusion, and when the cap is tightened, the top of the ridge becomes the top of the groove. A container cap device which is deformed by contacting a bottom portion. 2. The container cap device according to claim 1, wherein the ridge has an asymmetric cross-sectional shape. 3. The container cap device according to claim 2, wherein the ridge has an overhang. 4. The container cap device according to claim 1, wherein the cap has a cylindrical body fitted to the mouth formed on a top surface.